Solvent free fluidized polymer suspensions for oilfield servicing fluids

Abstract

This invention relates to a composition and use application of aqueous fluidized polymer suspensions of water soluble polysaccharides and/or polyvinyl alcohol (PVA) for use in oil field applications such completion fluids, drilling fluids, fracturing fluids and oil well cement slurries as rheology/viscosity modifier and fluid loss reducer for use where the affect on the marine environment is to be minimized.

1 . A suspension composition comprising 
 a) an oil field servicing fluid selected from the group consisting of drilling fluids, completion/workover fluids, fracturing fluids, and oil well cementing fluids, and    b) a fluid polymer suspension comprising a water soluble polymer suspended in an aqueous solution of a potassium phosphate compound, wherein the water soluble polymer is selected from the group consisting of water soluble polysaccharides and synthetic polymers.    
     
     
         2 . The suspension composition of  claim 1 , wherein the potassium phosphate compound is selected from the group consisting of potassium phosphate, potassium phosphate dibasic (K 2 HPO 4 ), potassium phosphate tribasic (K 3 PO 4 ), potassium phosphate monobasic (KH 2 PO 4 ) and phosphoric acid potassium salt (2:1) (KH 5 (PO 4 ) 2 ) and mixtures thereof.  
     
     
         3 . The suspension composition of  claim 1 , further comprising a stabilizer.  
     
     
         4 . The suspension composition of  claim 3 , wherein the stabilizer is selected from the group consisting of carboxymethylcellulose (CMC), xanthan gum and mixtures thereof.  
     
     
         5 . The suspension composition of  claim 1 , wherein the water soluble polymer is a water soluble polysaccharide.  
     
     
         6 . The suspension composition of  claim 5 , wherein the water soluble polysaccharide is selected from the group consisting of cellulose ethers, guar and guar derivatives.  
     
     
         7 . The suspension composition of  claim 6 , wherein the water soluble polysaccharide is a cellulose ether.  
     
     
         8 . The suspension composition of  claim 1 , wherein the cellulose ether is selected from the group consisting of hydroxyethyl cellulose (HEC), methyl cellulose (MC), hydroxypropyl cellulose (HPC), ethyl hydroxyethyl cellulose (EHEC), methyl hydroxyethyl cellulose (MHEC), hydrophobically modified hydroxyethyl cellulose (HMHEC), hydrophobically modified ethyl hydroxyethyl cellulose (HMEHEC), hydrophobically modified methyl hydroxyethyl cellulose (HMMHEC), ethyl cellulose (EC), methyl hydroxypropyl cellulose (MHPC), and carboxymethyl hydroxyethyl cellulose (CMHEC).  
     
     
         9 . The suspension composition of  claim 5 , wherein the potassium phosphate compound comprises potassium phosphate dibasic (K 2 HPO 4 ).  
     
     
         10 . The suspension composition of  claim 9 , wherein the water soluble polymer comprises HEC.  
     
     
         11 . The suspension composition of  claim 1 , wherein the synthetic polymer comprises polyvinyl alcohol (PVA).  
     
     
         12 . The suspension composition of  claim 10 , wherein the suspension composition further comprises an effective amount of a stabilizer wherein the stabilizer is selected from the group consisting of carboxymethylcellulose (CMC), xanthan gum and mixtures thereof.  
     
     
         13 . The suspension composition of  claim 11 , wherein the suspension composition further comprises an effective amount of a stabilizer wherein the stabilizer is selected from the group consisting of carboxymethylcellulose (CMC), xanthan gum and mixtures thereof.  
     
     
         14 . The suspension composition of  claim 1 , wherein the potassium phosphate compound comprises about 10-40 wt % of the fluid polymer suspension.  
     
     
         15 . The suspension composition of  claim 14 , wherein the potassium phosphate compound comprises about 20-30 wt % of the fluid polymer suspension.  
     
     
         16 . The suspension composition of  claim 15 , wherein the potassium phosphate compound comprises about 25 wt % of the fluid polymer suspension.  
     
     
         17 . The suspension composition of  claim 1 , wherein the water soluble polymer comprises about 5-50 wt % of the fluid polymer suspension.  
     
     
         18 . The suspension composition of  claim 17 , wherein the water soluble polymer comprises about 10-40 wt % of the fluid polymer suspension.  
     
     
         19 . The suspension composition of  claim 18 , wherein the water soluble polymer comprises about 20-25 wt % of the fluid polymer suspension.  
     
     
         20 . The suspension composition of  claim 10 , wherein potassium phosphate dibasic (K 2 HPO 4 ) comprises about 10-40 wt % of the fluid polymer suspension and wherein HEC comprises about 5-50 wt % of the composition suspension.  
     
     
         21 . The suspension composition of  claim 20 , wherein potassium phosphate dibasic (K 2 HPO 4 ) comprises about 20-30 wt % of the fluid polymer suspension and wherein HEC comprises about 10-40 wt % of the fluid polymer suspension.  
     
     
         22 . The suspension composition of  claim 21 , wherein potassium phosphate dibasic (K 2 HPO 4 ) comprises about 25 wt % of the fluid polymer suspension and wherein HEC comprises about 20-25 wt % of the fluid polymer suspension.  
     
     
         23 . The suspension composition of  claim 20  further comprising a stabilizer wherein the stabilizer is selected from the group consisting of carboxymethylcellulose (CMC), xanthan gum, sodium alginate and mixtures thereof and wherein the stabilizer comprises up to about 2 wt % of the fluid polymer suspension.  
     
     
         24 . The suspension composition of  claim 23 , wherein the stabilizer comprises up to about 1 wt % of the fluid polymer suspension.  
     
     
         25 . The suspension composition of  claim 24 , wherein the stabilizer comprises up to about 0.5 wt % of the fluid polymer suspension.  
     
     
         26 . The suspension composition of  claim 22 , further comprising a stabilizer wherein the stabilizer is selected from the group consisting of carboxymethylcellulose (CMC), xanthan gum, sodium alginate and mixtures thereof and wherein the stabilizer comprises up to about 0.5 wt % of the fluid polymer suspension.  
     
     
         27 . The suspension composition of  claim 1 , wherein the oil field servicing fluid comprises a drilling fluid.  
     
     
         28 . The suspension composition of  claim 1 , wherein the oil field servicing fluid comprises a completion/workover fluid.  
     
     
         29 . The suspension composition of  claim 1 , wherein the oil field servicing fluid comprises an oil well cementing fluid.  
     
     
         30 . The suspension composition of  claim 1 , wherein the oil field servicing fluid comprises a fracturing fluid.